>>1444898 I don't speak English, so sorry in advance. I'm using Google translator and I'm going to explain something that I know.
In the case of the modern narrow gauge, Brazil has railroads mostly with this gauge (3 ft 3 38 in), whose reason was greed and the lack of available resources. Two of them transport iron ore; one in the north / northeast (São Luís) was built until 1985, has a wide gauge (5 ft 3 in) and a wagon with 130 gross tons (286601 pounds). The other in the southeast (Vitória / Belo Horizonte) was built between 1904 and 1943 with narrow gauge and wagon with 100 gross tons, despite having a track of 68 kg / m (136 lb / yd).
As of the year 2000, other railways, mainly in the south, received wagons with 100 gross tons (220,462 pounds), but tracks with 37.2 kg / m (75 lb / yd) were maintained, which causes constant disasters. These do not bother anyone, since excluding the two ore railways, all the others do not carry passengers. When derailment occurs, the cargo is immediately looted.
